Parametric Design Method for Shapes with Aesthetic Free-Form Surfaces

  • Tetsuo Oya
  • Takenori Mikami
  • Takanobu Kaneko
  • Masatake Higashi
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4077)


In this paper, a parametric design method for aesthetic shapes which provides a direct and interactive modeling is presented. As used in an actual automobile design, our method utilizes a curve-ruler to create a free-form surface. In order to construct a surface, a curve-ruler is defined by a function like a polynomial at first. And then, two guide curves are generated by Bézier curves. Moving a curve-ruler on guide curves, a free-form surface is obtained as its locus. Designer only designates a type parameter of the curve-ruler and the parameters to allocate the curve-ruler on the guide curves. To construct a whole shape of a product, we introduce another set of parameters to control an outer shape. In this way, it is possible to control the local surface and the global shape independently. Moreover, the methods to generate a fillet, trimmed surface and features are presented. We have implemented a prototype system and will demonstrate its application on an automobile.


Schematic Parameter Curve Ruler Hole Feature Outer Shape Step Feature 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Tetsuo Oya
    • 1
  • Takenori Mikami
    • 1
  • Takanobu Kaneko
    • 2
  • Masatake Higashi
    • 1
  1. 1.Toyota Technological InstituteNagoyaJapan
  2. 2.AISIN Seiki Co., Ltd.AichiJapan

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